7921

£7921 is today's number.  It's how much was wasted replacing something we thought needed replacing, but actually didn't.  The best way to describe it is that we replaced a square window with an upside down square window thinking that they were 2 different things.  Now this has nothing to do with square windows.  It's to do with ThinkPad port replicators.  If you know what they are then you'll know that new ThinkPads don't fit the old ones unless you release the catch and slide the top back.  So we replaced the old ones with new port replicators as the new ThinkPads came in.  By accident one of the old port replicators released, and looked just like the new port replicators (minus one or two cosmetic differences).  Damn.